Systems and methods for conserving carrier gas

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United States of America Patent

PATENT NO 9874546
SERIAL NO

14808657

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Abstract

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A device for a gas chromatograph system includes an injector, a conduit assembly, a flow restrictor, and a pressure controller. The injector is connected to a carrier gas source and an auxiliary gas source. The conduit assembly surrounds the input end of an analytical column. A carrier gas is supplied at a constant pressure through a flow restrictor to the injector. A pressure controller is configured to control the pressure of an auxiliary gas supplied to the injector from the auxiliary source. The pressure controller is configured to operate in a first mode to provide a first auxiliary gas pressure sufficient to force a flow of the auxiliary gas and a sample onto the analytical column during an inject phase and to operate in a second mode to provide a second auxiliary gas pressure below a threshold necessary to flow auxiliary gas into the analytical column during a resolving phase.

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Patent Owner(s)

Patent OwnerAddress
THERMO FINNIGAN LLC355 RIVER OAKS PARKWAY SAN JOSE CA 95134

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
McCauley, Edward B Cedar Park, US 44 152

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